Hot deformation behavior and dynamic recrystallization of Cu-Cr-Zr alloy

High-temperature deformation behavior of Cu-Cr-Zr alloy was investigated by compressive tests on a Gleeble-1500D thermalmechanical simulating tester at 600-800 ℃ and strain rate range of 0. 001-10 s- 1. The microstructure evolution and dynamic recrystallization nucleation mechanism of Cu-Cr-Zr alloy were analyzed. The results show that the flow stress decreases with the increase of temperature while increases with the increase of strain rate. Both the increase of deformation temperature and the decrease of strain rate enhance dynamic recrystallization. The hot deformation activation energy Q = 392. 5 kJ / mol and constitutive equation are obtained from the correlativity of flow stress,strain rate and temperature by stepwise regression analysis.